Funding for this research was provided by:
Charité - Universitätsmedizin Berlin
Received: 2 January 2021
Accepted: 29 September 2021
First Online: 12 October 2021
Change Date: 26 October 2021
Change Type: Correction
Change Details: A Correction to this paper has been published:
Change Details: https://doi.org/10.1186/s12995-021-00340-0
: The study protocol is in line with the current version of the Declaration of Helsinki (2013) and therefore approved by the Ethics Committee of the Charité – Universitätsmedizin (Nr.: EA2/185/19).
: Neither the article nor parts of it are published elsewhere. Furthermore, this manuscript is not under consideration for publication in another journal. All authors consent to the publication of the manuscript in BMC Public Health.
: The authors declare that there are no conflicts of interest. There is only an interest in the publication of this article.